Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
thien van » thi van
hanh tai » thanh tai, hang tai, han tai
hau luc » hau loc, cau luc, nhan luc
van hau » van ha, van hai, van dau
tu nong » tu dong, tu cong, tu tong
tu nang » tru nang, tu nano, tu lang
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach ((tu nang) OR (tu nong)) xa hoi. thien van hau luc va ((hanh tai) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach ((tu nang) OR (tu nong)) xa hoi. thien van hau luc va ((hanh tai) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach ((tu nang) OR (tu nong)) xa hoi. thien van hau luc va ((hanh tai) or (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: nuoc sach ((tu nang) OR (tu nong)) xa hoi. thien van hau luc va ((hanh tai) or (hanh vi)) cua tre*.